Ben Affleck's Batman Muscles Keep Getting Bigger & Bigger!

Ben Affleck‘s muscles are looking very defined in his tight blue t-shirt while stepping out on Wednesday afternoon (February 11) in Los Angeles.

The 42-year-old actor is going to be playing the role of Batman in the upcoming Batman v Superman: Dawn of Justice and he has been working on his body ever since he got the part.

PHOTOS: Check out the latest pics of Ben Affleck

Ben‘s muscles sure keep getting bigger and bigger!

Also pictured inside: Ben‘s wife Jennifer Garner stepping out the day before at the Brentwood Country Mart in Santa Monica.

FYI: Ben is wearing Bally sneakers.